15 September 1943: The convoy retires to Sakura-Jima, Kagoshima Bay because of the threat of a submarine attack.

17 September 1943: While the convoy is making preparations to leave Kagoshima, a typhoon warning is isssued at 0600: "typhoon, approx. 17N x 128E, atmospheric pressure 980 millibars, proceeding West-North-West with 25 to 30 km per hour, take strict caution." Despite the approaching typhoon, at 1730 the convoy departs. That night, the seas become very high.

18 September 1943: At 1430, the transport commander orders the convoy to take shelter at Naze Harbor, Amami-O-Shima. About 1900, the convoy arrives at Naze.

19 September 1943: At midnight, the typhoon passes 55 km eastward of Naze. Atmospheric pressure at Naze Harbor falls to 961 millibars, wind velocity
reaches its maximum at 53 meters. At this time, the typhoon is reported ranking
next only to the devastating Muroto Typhoon of 1934.

Off Amami-O-Shima. KYOKUYO MARU, carrying about half her standard weight, is riding a little high. She runs aground and is wrecked at 28-20N, 129-30E, but only one crewman is lost. TAKETOYO, KOSO and TANGO MARUs are also driven ashore by the storm.

HONAN MARU is also stranded, but refloated and towed by an unknown ship from convoy 197 to Nagasaki.

9 April 1944:At 0140, after completing the end-around, Grady fires
four torpedoes at the target and gets one hit directly under the stack. Between
0144-0145, he fires two more torpedoes at the target, but both miss. At 0152,
Grady fires a stern torpedo that hits between the stack and the stern. HONAN
MARU explodes and sinks in 15 seconds taking down all hands at 33-50N-128.01E.